read/write repository regression tests

[ryanSoley]

What

• adds regression tests to validate all interactions between the repository layer and the filesystem itself
  • test_read_regression tests that the repository accurately retrieves data from the filesystem
  • test_write_regression tests that the repository accurately writes data to the filesystem
  • test_delete_regression tests that the repository accurately removes data from the filesystem
  • test_read_write_regression tests that the repository accurately retrieves data written by the repository itself

How to Test

• python -m pytest tests/regression